Type-writing machine.



L. R. ROBERTS.

TYPE WRITING MACHINE.

APPLICATION FILED FEB-21,1916.

Patented June 5, 1917.

2 SHEETS-SHEET ,I.

L. R ROBERTS.

TYPE WRITING MACHINE.

APPLICATION FILED FEB-21. I915.

Patented June 5, 1917.

2 SHEETS-SHEET 2.

LYMAN R. ROBERTS, OF RUTHERFORD, NEW JERSEY, ASSTGNOR TO UNDERWOOD TYPE- 'VVIRI'JJEIR. COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Original application filed May 14, 1913, Serial No. 767,499. Divided and this application filed February 21,

1916. Serial No. 79,550.

To all whom it may concern:

Be it known that I,LYMAN R. ROBERTS, a citizen of the United States, residing in Rutherford, in the county of Rutherford and State of New Jersey, have invented certain new and useful Improvements in Type- Viriting Machines, of which the following is a specification.

My invention relates to typewriting machines, and is herein disclosed as applied to a modified Underwood typewriting machine, wherein the usual type-bars strike against the front side of a traveling platen.

This application is a division of my application No. 767,499, filed May 14., 1913,

(patented March 28, 1916, No. 1,177 ,140) and the present application is directed to a platen especially adapted to hold worksheets of diflerent characters, and large in size, such as ledger sheets, statement sheets, proof sheets, etc. The platen isherein disclosed as a section of a cylinder, and is provided along its opposite edges with independently operable clamps or holders for the work-sheets. These clamps project through openings in the platen, and serve as means to aline the edge of the work-sheet.

Other features and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 is an end elevation View of a typewriting machine, constructed in accordance with the principles of my invention. Fig. 2 is a [detail showing the line-space mechanism.

Fig. 3 is a part sectional front view of .the machine.

The platen 1 is 'rota'tably mounted in a traveling platen frame or carriage 2, driven by a spring motor 3, connected through a band 4 to the carriage. Bearing lugs 5 on the platen frame are slidable on a stationary carriage rail 6, on the machine frame 7. The front of the platen frame has a bear ing roller 8 which runs on a stationary guide rail 9. The platen axle 10 is seated in bearings 11, and leaf springs 13 bearing on the upper surface of the platen axle serve to prevent accidental displacement of the platen.

The platen may be rotated by means of hand wheels 14., on the ends of the platen, or any suitable form of line-space mechanism. As shown herein, the hne-space mechis mounted on the inner anism comprises a lever 15 pivoted at 16' to the platen frame, and having at its rear enda pivoted spring-pressed pawl 17 cooperatmg with a rack 18 on the left-hand end of the platen, the pawl 17 having a finger piece 17*, for lifting the pawl from the rack. The lever 15 is normally held in the position shown in Fig. 1, by a spring 19. 'lVhen the free end of the lever is depressed, it is carried to the position shown in Fig. 2, the platen being rotated with it a distance of one line-space. As the lever 15 returns, the pawl rides idly over the rack and engages the next lower tooth of the rack. The platen is held against accidental rotation by means of a spring detent 20 having a curved end 21,.Which seats between adjacent rack teeth, as shown in Fig. 3. The platen is preferably in the form ofa section of a cylinder, and as herein shown is substantially semi-cylindrical.

It will be understood that the platen surface may extend through a greater or less arc, and, in some instances, may form acornplete cylinder. The platen is of large diameter, as here shown, being in the neigh borhood of 10 inches in diameter, so that the printing area is sufficient to accommodate any ordinary work-piece it is desired to place thereon. The radius of curvature being large, it is not necessary to bend or. curve. the work-sheet'suificiently to prevent it from readily conforming to the platen surface, and this form of platen surface also facilitates the positioning and clamping of the work-sheet.

The means for holding a work-sheet in position comprises clamps 22, extending through the platen and having offset ends Patented June-5, 1917. I

23, which overhand the work-sheets, and

clamp them against the surface of the platen. The clamps are held in clamping position by springs 24. Each set of clamps is arranged in an arc of a circle, there beingone set of clamps adjacent each end ofthe platen. Each set of clamps is released by means of an arc-shaped'bar 25 having cam surfaces 26' to engage the clamps and lift them to releasing position. The cam bar 25 side of the platen by means of brackets 27, secured to or formed'integral with the bar, said brackets slidably held against the inner face of the platen by shouldered screws 28 extending in the brackets and threaded intothe'platen. An arm 29 on the cam bar projects through aslo't 30in the platen, and

' 'In the positionseen 22 are holding a work-sheet against the platen. Said clamps, however, are

gas a knob 01: handle 31 for operating the in Fig. 3,the clamps released the handle 31 downward, thereby causin the cams 26 to ride under the clamps 22, and cam the oflset ends 23 clear of the platen. When thus clear of the by pulling platen, the work-sheet may be placed on the platen and the clamps serve to aline the edge of the work-sheet.- If desired, the workv sheet .may include. notches adapted to reg-- -ister with the stems of the clamps. 'The printing on-a by types 32, on type-bars 33 pivoted on the usual curved fulcrum rod 34 and actuated i by finger-keys 35 on key-levers 36 connected work-sheet is effected through bell-crank levers 37 to their typebars. The keylevers 36 are pivoted at, the rear end of the machine at 38, so that when a rack 41 on i with an 46 on a rock shaft 47, to which are also secured rock arms 48 carrying a 11111- 'versal bar- 49 actuated by -heels 50 on the type-bars. The rack 41 is carried on arms '51 pivoted at'52. to the platen frame.

Attention is called to the main application No. 767,499 (Patent No. 1,117,140) ,and

was I 1 the "present application,

also to a divisional application No. 851,707 (Patent No. 1,177,275 of March 28, 1916); p which is a separate division of 767,499, being directed to the platen structure.

Variations may be resorted to within the scope of the invention, and portions of the improvements may Having thus described. my invention,

claim: I

1. In a typewriti-ng machine, the combination of a segmental platen mounted for rocollating board or table permitting,

front of the, i

in mesh with be used without others.

- tation about a horizontal axis to bring the printing surface thereon above the axis to face upwardly for the assembling thereon of work-pieces, said surface being of such large curvature and area as to form a sheetin said position, the assemblingthereon of sheets or forms overlying one another in different positions on the table, printing mechanism, rotate the platen step by step for bringing the Work-sheets thereon line by line into printing position, and a carriage on the platenis mounted for letter-feed travel in the direction of its axis.

2. In combination, a sheet-collating board curved to form a segment of'sutficiently large diameter to permit the collation of sheets on all portions thereof simultaneously, the surface of said board,being constructed to receive type-impressions, a set of types mounted to write upon the front of said collating board, and a letter-feeding carriage Whereon said collating board is mounted to rotate about its axis.

3. In combination, a sheet-collating board curved to form a segment of sufficiently large diameter to permit the collation of sheets on all portions thereof simultane-- ously, the surface of said board being constructed to receive type-impressions, a set of types mounted to write upon the front of said collating board, and a letter-feeding carriage whereon said collating board is mounted to rotate about its axis, said seg- Enent being of substantially semi-cylindrical orm.

4. In combination, a sheet-collating boardcurved to form a segment of sufliciently large diameter to permit the collation of sheets on all portions thereof simultaneously, the surface of said board being constructed to receive type-impressions, a set of types mounted to write upon the front of said. collating board, a letter-feeding carriage whereon said collating board is mounted to rotate about its axis, and means connected to said collating board for line-spacing the same. LYMAN R. ROBERTS.

VVitness'es:

ARTHUR A. JOHNSON, EDITH B. LIBBEY.

and line-space mechanlsln to which.

while a main ledger or analogous sheet and other. 

